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<div class="title">pthread_tools.hpp</div>  </div>
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<a href="pthread__tools_8hpp.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="preprocessor">#ifndef DEF_PTHREAD_TOOLS_HPP</span></div>
<div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define DEF_PTHREAD_TOOLS_HPP</span></div>
<div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="comment">// Stolen from GraphLab</span></div>
<div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;</div>
<div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="preprocessor">#include &lt;cstdlib&gt;</span></div>
<div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="preprocessor">#include &lt;memory.h&gt;</span></div>
<div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="preprocessor">#include &lt;pthread.h&gt;</span></div>
<div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;<span class="preprocessor">#include &lt;semaphore.h&gt;</span></div>
<div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;<span class="preprocessor">#include &lt;sched.h&gt;</span></div>
<div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;<span class="preprocessor">#include &lt;signal.h&gt;</span></div>
<div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="preprocessor">#include &lt;sys/time.h&gt;</span></div>
<div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;<span class="preprocessor">#include &lt;vector&gt;</span></div>
<div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;<span class="preprocessor">#include &lt;cassert&gt;</span></div>
<div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;<span class="preprocessor">#include &lt;list&gt;</span></div>
<div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;<span class="preprocessor">#include &lt;iostream&gt;</span> </div>
<div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;</div>
<div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;<span class="preprocessor">#undef _POSIX_SPIN_LOCKS</span></div>
<div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define _POSIX_SPIN_LOCKS -1</span></div>
<div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;</div>
<div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;</div>
<div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;</div>
<div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;<span class="keyword">namespace </span>graphchi {</div>
<div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;    </div>
<div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;    </div>
<div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;    </div>
<div class="line"><a name="l00037"></a><span class="lineno"><a class="code" href="classgraphchi_1_1mutex.html">   37</a></span>&#160;    <span class="keyword">class </span><a class="code" href="classgraphchi_1_1mutex.html">mutex</a> {</div>
<div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;    <span class="keyword">private</span>:</div>
<div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;        <span class="comment">// mutable not actually needed</span></div>
<div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;        <span class="keyword">mutable</span> pthread_mutex_t m_mut;</div>
<div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;    <span class="keyword">public</span>:</div>
<div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;        <a class="code" href="classgraphchi_1_1mutex.html">mutex</a>() {</div>
<div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;            <span class="keywordtype">int</span> error = pthread_mutex_init(&amp;m_mut, NULL);</div>
<div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;            assert(!error);</div>
<div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;        }</div>
<div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;        <span class="keyword">inline</span> <span class="keywordtype">void</span> lock()<span class="keyword"> const </span>{</div>
<div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;            <span class="keywordtype">int</span> error = pthread_mutex_lock( &amp;m_mut  );</div>
<div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;            assert(!error);</div>
<div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;        }</div>
<div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;        <span class="keyword">inline</span> <span class="keywordtype">void</span> unlock()<span class="keyword"> const </span>{</div>
<div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;            <span class="keywordtype">int</span> error = pthread_mutex_unlock( &amp;m_mut );</div>
<div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;            assert(!error);</div>
<div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;        }</div>
<div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;        <span class="keyword">inline</span> <span class="keywordtype">bool</span> try_lock()<span class="keyword"> const </span>{</div>
<div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;            <span class="keywordflow">return</span> pthread_mutex_trylock( &amp;m_mut ) == 0;</div>
<div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;        }</div>
<div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;        ~<a class="code" href="classgraphchi_1_1mutex.html">mutex</a>(){</div>
<div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;            <span class="keywordtype">int</span> error = pthread_mutex_destroy( &amp;m_mut );</div>
<div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;            assert(!error);</div>
<div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;        }</div>
<div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;        <span class="keyword">friend</span> <span class="keyword">class </span><a class="code" href="classgraphchi_1_1conditional.html">conditional</a>;</div>
<div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;    }; <span class="comment">// End of Mutex</span></div>
<div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;    </div>
<div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;<span class="preprocessor">#if _POSIX_SPIN_LOCKS &gt;= 0</span></div>
<div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;<span class="preprocessor"></span>    <span class="comment">// We should change this to use a test for posix_spin_locks eventually</span></div>
<div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;    </div>
<div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;    <span class="comment">// #ifdef __linux__</span></div>
<div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;<span class="comment"></span>    <span class="keyword">class </span><a class="code" href="classgraphchi_1_1mutex.html">spinlock</a> {</div>
<div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;    <span class="keyword">private</span>:</div>
<div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;        <span class="comment">// mutable not actually needed</span></div>
<div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;        <span class="keyword">mutable</span> pthread_spinlock_t m_spin;</div>
<div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;    <span class="keyword">public</span>:</div>
<div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;        <a class="code" href="namespacegraphchi.html#a86d970062f7c0596b53faaabd29cf9a8" title="if spinlock not supported, it is typedef it to a mutex.">spinlock</a> () {</div>
<div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;            <span class="keywordtype">int</span> error = pthread_spin_init(&amp;m_spin, PTHREAD_PROCESS_PRIVATE);</div>
<div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;            assert(!error);</div>
<div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;        }</div>
<div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;        </div>
<div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;        <span class="keyword">inline</span> <span class="keywordtype">void</span> lock()<span class="keyword"> const </span>{ </div>
<div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;            <span class="keywordtype">int</span> error = pthread_spin_lock( &amp;m_spin  );</div>
<div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;            assert(!error);</div>
<div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;        }</div>
<div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;        <span class="keyword">inline</span> <span class="keywordtype">void</span> unlock()<span class="keyword"> const </span>{</div>
<div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;            <span class="keywordtype">int</span> error = pthread_spin_unlock( &amp;m_spin );</div>
<div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;            assert(!error);</div>
<div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160;        }</div>
<div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160;        <span class="keyword">inline</span> <span class="keywordtype">bool</span> try_lock()<span class="keyword"> const </span>{</div>
<div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;            <span class="keywordflow">return</span> pthread_spin_trylock( &amp;m_spin ) == 0;</div>
<div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160;        }</div>
<div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;        ~<a class="code" href="namespacegraphchi.html#a86d970062f7c0596b53faaabd29cf9a8" title="if spinlock not supported, it is typedef it to a mutex.">spinlock</a>(){</div>
<div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;            <span class="keywordtype">int</span> error = pthread_spin_destroy( &amp;m_spin );</div>
<div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;            assert(!error);</div>
<div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;        }</div>
<div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160;        <span class="keyword">friend</span> <span class="keyword">class </span>conditional;</div>
<div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;    }; <span class="comment">// End of spinlock</span></div>
<div class="line"><a name="l00103"></a><span class="lineno">  103</span>&#160;<span class="preprocessor">#define SPINLOCK_SUPPORTED 1</span></div>
<div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#else</span></div>
<div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00106"></a><span class="lineno"><a class="code" href="namespacegraphchi.html#a86d970062f7c0596b53faaabd29cf9a8">  106</a></span>&#160;    <span class="keyword">typedef</span> <a class="code" href="classgraphchi_1_1mutex.html">mutex</a> <a class="code" href="namespacegraphchi.html#a86d970062f7c0596b53faaabd29cf9a8" title="if spinlock not supported, it is typedef it to a mutex.">spinlock</a>;</div>
<div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;<span class="preprocessor">#define SPINLOCK_SUPPORTED 0</span></div>
<div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00109"></a><span class="lineno">  109</span>&#160;<span class="preprocessor"></span>    </div>
<div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160;    </div>
<div class="line"><a name="l00115"></a><span class="lineno"><a class="code" href="classgraphchi_1_1conditional.html">  115</a></span>&#160;    <span class="keyword">class </span><a class="code" href="classgraphchi_1_1conditional.html">conditional</a> {</div>
<div class="line"><a name="l00116"></a><span class="lineno">  116</span>&#160;    <span class="keyword">private</span>:</div>
<div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160;        <span class="keyword">mutable</span> pthread_cond_t  m_cond;</div>
<div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;    <span class="keyword">public</span>:</div>
<div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;        <a class="code" href="classgraphchi_1_1conditional.html">conditional</a>() {</div>
<div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160;            <span class="keywordtype">int</span> error = pthread_cond_init(&amp;m_cond, NULL);</div>
<div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160;            assert(!error);</div>
<div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;        }</div>
<div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;        <span class="keyword">inline</span> <span class="keywordtype">void</span> wait(<span class="keyword">const</span> <a class="code" href="classgraphchi_1_1mutex.html">mutex</a>&amp; mut)<span class="keyword"> const </span>{</div>
<div class="line"><a name="l00124"></a><span class="lineno">  124</span>&#160;            <span class="keywordtype">int</span> error = pthread_cond_wait(&amp;m_cond, &amp;mut.m_mut);</div>
<div class="line"><a name="l00125"></a><span class="lineno">  125</span>&#160;            assert(!error);</div>
<div class="line"><a name="l00126"></a><span class="lineno">  126</span>&#160;        }</div>
<div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;        <span class="keyword">inline</span> <span class="keywordtype">int</span> timedwait(<span class="keyword">const</span> <a class="code" href="classgraphchi_1_1mutex.html">mutex</a>&amp; mut, <span class="keywordtype">int</span> sec)<span class="keyword"> const </span>{</div>
<div class="line"><a name="l00128"></a><span class="lineno">  128</span>&#160;            <span class="keyword">struct </span>timespec timeout;</div>
<div class="line"><a name="l00129"></a><span class="lineno">  129</span>&#160;            <span class="keyword">struct </span>timeval tv;</div>
<div class="line"><a name="l00130"></a><span class="lineno">  130</span>&#160;            <span class="keyword">struct </span>timezone tz;</div>
<div class="line"><a name="l00131"></a><span class="lineno">  131</span>&#160;            gettimeofday(&amp;tv, &amp;tz);</div>
<div class="line"><a name="l00132"></a><span class="lineno">  132</span>&#160;            timeout.tv_nsec = 0;</div>
<div class="line"><a name="l00133"></a><span class="lineno">  133</span>&#160;            timeout.tv_sec = tv.tv_sec + sec;</div>
<div class="line"><a name="l00134"></a><span class="lineno">  134</span>&#160;            <span class="keywordflow">return</span> pthread_cond_timedwait(&amp;m_cond, &amp;mut.m_mut, &amp;timeout);</div>
<div class="line"><a name="l00135"></a><span class="lineno">  135</span>&#160;        }</div>
<div class="line"><a name="l00136"></a><span class="lineno">  136</span>&#160;        <span class="keyword">inline</span> <span class="keywordtype">void</span> signal()<span class="keyword"> const </span>{</div>
<div class="line"><a name="l00137"></a><span class="lineno">  137</span>&#160;            <span class="keywordtype">int</span> error = pthread_cond_signal(&amp;m_cond);</div>
<div class="line"><a name="l00138"></a><span class="lineno">  138</span>&#160;            assert(!error);</div>
<div class="line"><a name="l00139"></a><span class="lineno">  139</span>&#160;        }</div>
<div class="line"><a name="l00140"></a><span class="lineno">  140</span>&#160;        <span class="keyword">inline</span> <span class="keywordtype">void</span> broadcast()<span class="keyword"> const </span>{</div>
<div class="line"><a name="l00141"></a><span class="lineno">  141</span>&#160;            <span class="keywordtype">int</span> error = pthread_cond_broadcast(&amp;m_cond);</div>
<div class="line"><a name="l00142"></a><span class="lineno">  142</span>&#160;            assert(!error);</div>
<div class="line"><a name="l00143"></a><span class="lineno">  143</span>&#160;        }</div>
<div class="line"><a name="l00144"></a><span class="lineno">  144</span>&#160;        ~<a class="code" href="classgraphchi_1_1conditional.html">conditional</a>() {</div>
<div class="line"><a name="l00145"></a><span class="lineno">  145</span>&#160;            <span class="keywordtype">int</span> error = pthread_cond_destroy(&amp;m_cond);</div>
<div class="line"><a name="l00146"></a><span class="lineno">  146</span>&#160;            assert(!error);</div>
<div class="line"><a name="l00147"></a><span class="lineno">  147</span>&#160;        }</div>
<div class="line"><a name="l00148"></a><span class="lineno">  148</span>&#160;    }; <span class="comment">// End conditional</span></div>
<div class="line"><a name="l00149"></a><span class="lineno">  149</span>&#160;    </div>
<div class="line"><a name="l00154"></a><span class="lineno"><a class="code" href="classgraphchi_1_1semaphore.html">  154</a></span>&#160;    <span class="keyword">class </span><a class="code" href="classgraphchi_1_1semaphore.html">semaphore</a> {</div>
<div class="line"><a name="l00155"></a><span class="lineno">  155</span>&#160;    <span class="keyword">private</span>:</div>
<div class="line"><a name="l00156"></a><span class="lineno">  156</span>&#160;        <span class="keyword">mutable</span> sem_t  m_sem;</div>
<div class="line"><a name="l00157"></a><span class="lineno">  157</span>&#160;    <span class="keyword">public</span>:</div>
<div class="line"><a name="l00158"></a><span class="lineno">  158</span>&#160;        <a class="code" href="classgraphchi_1_1semaphore.html">semaphore</a>() {</div>
<div class="line"><a name="l00159"></a><span class="lineno">  159</span>&#160;            <span class="keywordtype">int</span> error = sem_init(&amp;m_sem, 0,0);</div>
<div class="line"><a name="l00160"></a><span class="lineno">  160</span>&#160;            assert(!error);</div>
<div class="line"><a name="l00161"></a><span class="lineno">  161</span>&#160;        }</div>
<div class="line"><a name="l00162"></a><span class="lineno">  162</span>&#160;        <span class="keyword">inline</span> <span class="keywordtype">void</span> post()<span class="keyword"> const </span>{</div>
<div class="line"><a name="l00163"></a><span class="lineno">  163</span>&#160;            <span class="keywordtype">int</span> error = sem_post(&amp;m_sem);</div>
<div class="line"><a name="l00164"></a><span class="lineno">  164</span>&#160;            assert(!error);</div>
<div class="line"><a name="l00165"></a><span class="lineno">  165</span>&#160;        }</div>
<div class="line"><a name="l00166"></a><span class="lineno">  166</span>&#160;        <span class="keyword">inline</span> <span class="keywordtype">void</span> wait()<span class="keyword"> const </span>{</div>
<div class="line"><a name="l00167"></a><span class="lineno">  167</span>&#160;            <span class="keywordtype">int</span> error = sem_wait(&amp;m_sem);</div>
<div class="line"><a name="l00168"></a><span class="lineno">  168</span>&#160;            assert(!error);</div>
<div class="line"><a name="l00169"></a><span class="lineno">  169</span>&#160;        }</div>
<div class="line"><a name="l00170"></a><span class="lineno">  170</span>&#160;        ~<a class="code" href="classgraphchi_1_1semaphore.html">semaphore</a>() {</div>
<div class="line"><a name="l00171"></a><span class="lineno">  171</span>&#160;            <span class="keywordtype">int</span> error = sem_destroy(&amp;m_sem);</div>
<div class="line"><a name="l00172"></a><span class="lineno">  172</span>&#160;            assert(!error);</div>
<div class="line"><a name="l00173"></a><span class="lineno">  173</span>&#160;        }</div>
<div class="line"><a name="l00174"></a><span class="lineno">  174</span>&#160;    }; <span class="comment">// End semaphore</span></div>
<div class="line"><a name="l00175"></a><span class="lineno">  175</span>&#160;    </div>
<div class="line"><a name="l00176"></a><span class="lineno">  176</span>&#160;         </div>
<div class="line"><a name="l00177"></a><span class="lineno">  177</span>&#160;    </div>
<div class="line"><a name="l00178"></a><span class="lineno">  178</span>&#160;    </div>
<div class="line"><a name="l00179"></a><span class="lineno">  179</span>&#160;<span class="preprocessor">#define atomic_xadd(P, V) __sync_fetch_and_add((P), (V))</span></div>
<div class="line"><a name="l00180"></a><span class="lineno">  180</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define cmpxchg(P, O, N) __sync_val_compare_and_swap((P), (O), (N))</span></div>
<div class="line"><a name="l00181"></a><span class="lineno">  181</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define atomic_inc(P) __sync_add_and_fetch((P), 1)</span></div>
<div class="line"><a name="l00182"></a><span class="lineno">  182</span>&#160;<span class="preprocessor"></span>    </div>
<div class="line"><a name="l00190"></a><span class="lineno"><a class="code" href="classgraphchi_1_1spinrwlock.html">  190</a></span>&#160;    <span class="keyword">class </span><a class="code" href="classgraphchi_1_1spinrwlock.html">spinrwlock</a> {</div>
<div class="line"><a name="l00191"></a><span class="lineno">  191</span>&#160;        </div>
<div class="line"><a name="l00192"></a><span class="lineno">  192</span>&#160;        <span class="keyword">union </span>rwticket {</div>
<div class="line"><a name="l00193"></a><span class="lineno">  193</span>&#160;            <span class="keywordtype">unsigned</span> u;</div>
<div class="line"><a name="l00194"></a><span class="lineno">  194</span>&#160;            <span class="keywordtype">unsigned</span> <span class="keywordtype">short</span> us;</div>
<div class="line"><a name="l00195"></a><span class="lineno">  195</span>&#160;            __extension__ <span class="keyword">struct </span>{</div>
<div class="line"><a name="l00196"></a><span class="lineno">  196</span>&#160;                <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> write;</div>
<div class="line"><a name="l00197"></a><span class="lineno">  197</span>&#160;                <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> read;</div>
<div class="line"><a name="l00198"></a><span class="lineno">  198</span>&#160;                <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> users;</div>
<div class="line"><a name="l00199"></a><span class="lineno">  199</span>&#160;            } s;</div>
<div class="line"><a name="l00200"></a><span class="lineno">  200</span>&#160;        };</div>
<div class="line"><a name="l00201"></a><span class="lineno">  201</span>&#160;        <span class="keyword">mutable</span> <span class="keywordtype">bool</span> writing;</div>
<div class="line"><a name="l00202"></a><span class="lineno">  202</span>&#160;        <span class="keyword">mutable</span> <span class="keyword">volatile</span> rwticket l;</div>
<div class="line"><a name="l00203"></a><span class="lineno">  203</span>&#160;    <span class="keyword">public</span>:</div>
<div class="line"><a name="l00204"></a><span class="lineno">  204</span>&#160;        <a class="code" href="classgraphchi_1_1spinrwlock.html">spinrwlock</a>() {</div>
<div class="line"><a name="l00205"></a><span class="lineno">  205</span>&#160;            memset(const_cast&lt;rwticket*&gt;(&amp;l), 0, <span class="keyword">sizeof</span>(rwticket));</div>
<div class="line"><a name="l00206"></a><span class="lineno">  206</span>&#160;        }</div>
<div class="line"><a name="l00207"></a><span class="lineno">  207</span>&#160;        <span class="keyword">inline</span> <span class="keywordtype">void</span> writelock()<span class="keyword"> const </span>{</div>
<div class="line"><a name="l00208"></a><span class="lineno">  208</span>&#160;            <span class="keywordtype">unsigned</span> me = atomic_xadd(&amp;l.u, (1&lt;&lt;16));</div>
<div class="line"><a name="l00209"></a><span class="lineno">  209</span>&#160;            <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> val = me &gt;&gt; 16;</div>
<div class="line"><a name="l00210"></a><span class="lineno">  210</span>&#160;            </div>
<div class="line"><a name="l00211"></a><span class="lineno">  211</span>&#160;            <span class="keywordflow">while</span> (val != l.s.write) sched_yield();</div>
<div class="line"><a name="l00212"></a><span class="lineno">  212</span>&#160;            writing = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00213"></a><span class="lineno">  213</span>&#160;        }</div>
<div class="line"><a name="l00214"></a><span class="lineno">  214</span>&#160;        </div>
<div class="line"><a name="l00215"></a><span class="lineno">  215</span>&#160;        <span class="keyword">inline</span> <span class="keywordtype">void</span> wrunlock()<span class="keyword"> const</span>{</div>
<div class="line"><a name="l00216"></a><span class="lineno">  216</span>&#160;            rwticket t = *<span class="keyword">const_cast&lt;</span>rwticket*<span class="keyword">&gt;</span>(&amp;l);</div>
<div class="line"><a name="l00217"></a><span class="lineno">  217</span>&#160;            </div>
<div class="line"><a name="l00218"></a><span class="lineno">  218</span>&#160;            t.s.write++;</div>
<div class="line"><a name="l00219"></a><span class="lineno">  219</span>&#160;            t.s.read++;</div>
<div class="line"><a name="l00220"></a><span class="lineno">  220</span>&#160;            </div>
<div class="line"><a name="l00221"></a><span class="lineno">  221</span>&#160;            *(<span class="keyword">volatile</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">short</span> *) (&amp;l) = t.us;</div>
<div class="line"><a name="l00222"></a><span class="lineno">  222</span>&#160;            writing = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00223"></a><span class="lineno">  223</span>&#160;            __asm(<span class="stringliteral">&quot;mfence&quot;</span>);</div>
<div class="line"><a name="l00224"></a><span class="lineno">  224</span>&#160;        }</div>
<div class="line"><a name="l00225"></a><span class="lineno">  225</span>&#160;        </div>
<div class="line"><a name="l00226"></a><span class="lineno">  226</span>&#160;        <span class="keyword">inline</span> <span class="keywordtype">void</span> readlock()<span class="keyword"> const </span>{</div>
<div class="line"><a name="l00227"></a><span class="lineno">  227</span>&#160;            <span class="keywordtype">unsigned</span> me = atomic_xadd(&amp;l.u, (1&lt;&lt;16));</div>
<div class="line"><a name="l00228"></a><span class="lineno">  228</span>&#160;            <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> val = me &gt;&gt; 16;</div>
<div class="line"><a name="l00229"></a><span class="lineno">  229</span>&#160;            </div>
<div class="line"><a name="l00230"></a><span class="lineno">  230</span>&#160;            <span class="keywordflow">while</span> (val != l.s.read) sched_yield();</div>
<div class="line"><a name="l00231"></a><span class="lineno">  231</span>&#160;            l.s.read++;</div>
<div class="line"><a name="l00232"></a><span class="lineno">  232</span>&#160;        }</div>
<div class="line"><a name="l00233"></a><span class="lineno">  233</span>&#160;        </div>
<div class="line"><a name="l00234"></a><span class="lineno">  234</span>&#160;        <span class="keyword">inline</span> <span class="keywordtype">void</span> rdunlock()<span class="keyword"> const </span>{</div>
<div class="line"><a name="l00235"></a><span class="lineno">  235</span>&#160;            atomic_inc(&amp;l.s.write);</div>
<div class="line"><a name="l00236"></a><span class="lineno">  236</span>&#160;        }</div>
<div class="line"><a name="l00237"></a><span class="lineno">  237</span>&#160;        </div>
<div class="line"><a name="l00238"></a><span class="lineno">  238</span>&#160;        <span class="keyword">inline</span> <span class="keywordtype">void</span> unlock()<span class="keyword"> const </span>{</div>
<div class="line"><a name="l00239"></a><span class="lineno">  239</span>&#160;            <span class="keywordflow">if</span> (!writing) rdunlock();</div>
<div class="line"><a name="l00240"></a><span class="lineno">  240</span>&#160;            <span class="keywordflow">else</span> wrunlock();</div>
<div class="line"><a name="l00241"></a><span class="lineno">  241</span>&#160;        }</div>
<div class="line"><a name="l00242"></a><span class="lineno">  242</span>&#160;    };</div>
<div class="line"><a name="l00243"></a><span class="lineno">  243</span>&#160;    </div>
<div class="line"><a name="l00244"></a><span class="lineno">  244</span>&#160;<span class="preprocessor">#undef atomic_xadd</span></div>
<div class="line"><a name="l00245"></a><span class="lineno">  245</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#undef cmpxchg</span></div>
<div class="line"><a name="l00246"></a><span class="lineno">  246</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#undef atomic_inc</span></div>
<div class="line"><a name="l00247"></a><span class="lineno">  247</span>&#160;<span class="preprocessor"></span>    </div>
<div class="line"><a name="l00248"></a><span class="lineno">  248</span>&#160;    </div>
<div class="line"><a name="l00253"></a><span class="lineno"><a class="code" href="classgraphchi_1_1rwlock.html">  253</a></span>&#160;    <span class="keyword">class </span><a class="code" href="classgraphchi_1_1rwlock.html">rwlock</a> {</div>
<div class="line"><a name="l00254"></a><span class="lineno">  254</span>&#160;    <span class="keyword">private</span>:</div>
<div class="line"><a name="l00255"></a><span class="lineno">  255</span>&#160;        <span class="keyword">mutable</span> pthread_rwlock_t m_rwlock;</div>
<div class="line"><a name="l00256"></a><span class="lineno">  256</span>&#160;    <span class="keyword">public</span>:</div>
<div class="line"><a name="l00257"></a><span class="lineno">  257</span>&#160;        <a class="code" href="classgraphchi_1_1rwlock.html">rwlock</a>() {</div>
<div class="line"><a name="l00258"></a><span class="lineno">  258</span>&#160;            <span class="keywordtype">int</span> error = pthread_rwlock_init(&amp;m_rwlock, NULL);</div>
<div class="line"><a name="l00259"></a><span class="lineno">  259</span>&#160;            assert(!error);</div>
<div class="line"><a name="l00260"></a><span class="lineno">  260</span>&#160;        }</div>
<div class="line"><a name="l00261"></a><span class="lineno">  261</span>&#160;        ~<a class="code" href="classgraphchi_1_1rwlock.html">rwlock</a>() {</div>
<div class="line"><a name="l00262"></a><span class="lineno">  262</span>&#160;            <span class="keywordtype">int</span> error = pthread_rwlock_destroy(&amp;m_rwlock);</div>
<div class="line"><a name="l00263"></a><span class="lineno">  263</span>&#160;            assert(!error);</div>
<div class="line"><a name="l00264"></a><span class="lineno">  264</span>&#160;        }</div>
<div class="line"><a name="l00265"></a><span class="lineno">  265</span>&#160;        <span class="keyword">inline</span> <span class="keywordtype">void</span> readlock()<span class="keyword"> const </span>{</div>
<div class="line"><a name="l00266"></a><span class="lineno">  266</span>&#160;            pthread_rwlock_rdlock(&amp;m_rwlock);</div>
<div class="line"><a name="l00267"></a><span class="lineno">  267</span>&#160;            <span class="comment">//assert(!error);</span></div>
<div class="line"><a name="l00268"></a><span class="lineno">  268</span>&#160;        }</div>
<div class="line"><a name="l00269"></a><span class="lineno">  269</span>&#160;        <span class="keyword">inline</span> <span class="keywordtype">void</span> writelock()<span class="keyword"> const </span>{</div>
<div class="line"><a name="l00270"></a><span class="lineno">  270</span>&#160;            pthread_rwlock_wrlock(&amp;m_rwlock);</div>
<div class="line"><a name="l00271"></a><span class="lineno">  271</span>&#160;            <span class="comment">//assert(!error);</span></div>
<div class="line"><a name="l00272"></a><span class="lineno">  272</span>&#160;        }</div>
<div class="line"><a name="l00273"></a><span class="lineno">  273</span>&#160;        <span class="keyword">inline</span> <span class="keywordtype">void</span> unlock()<span class="keyword"> const </span>{</div>
<div class="line"><a name="l00274"></a><span class="lineno">  274</span>&#160;            pthread_rwlock_unlock(&amp;m_rwlock);</div>
<div class="line"><a name="l00275"></a><span class="lineno">  275</span>&#160;            <span class="comment">//assert(!error);</span></div>
<div class="line"><a name="l00276"></a><span class="lineno">  276</span>&#160;        }</div>
<div class="line"><a name="l00277"></a><span class="lineno">  277</span>&#160;        <span class="keyword">inline</span> <span class="keywordtype">void</span> rdunlock()<span class="keyword"> const </span>{</div>
<div class="line"><a name="l00278"></a><span class="lineno">  278</span>&#160;            unlock();</div>
<div class="line"><a name="l00279"></a><span class="lineno">  279</span>&#160;        }</div>
<div class="line"><a name="l00280"></a><span class="lineno">  280</span>&#160;        <span class="keyword">inline</span> <span class="keywordtype">void</span> wrunlock()<span class="keyword"> const </span>{</div>
<div class="line"><a name="l00281"></a><span class="lineno">  281</span>&#160;            unlock();</div>
<div class="line"><a name="l00282"></a><span class="lineno">  282</span>&#160;        }</div>
<div class="line"><a name="l00283"></a><span class="lineno">  283</span>&#160;    }; <span class="comment">// End rwlock</span></div>
<div class="line"><a name="l00284"></a><span class="lineno">  284</span>&#160;    </div>
<div class="line"><a name="l00289"></a><span class="lineno">  289</span>&#160;<span class="preprocessor">#ifdef __linux__</span></div>
<div class="line"><a name="l00290"></a><span class="lineno">  290</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00294"></a><span class="lineno">  294</span>&#160;    <span class="keyword">class </span><a class="code" href="classgraphchi_1_1barrier.html">barrier</a> {</div>
<div class="line"><a name="l00295"></a><span class="lineno">  295</span>&#160;    <span class="keyword">private</span>:</div>
<div class="line"><a name="l00296"></a><span class="lineno">  296</span>&#160;        <span class="keyword">mutable</span> pthread_barrier_t m_barrier;</div>
<div class="line"><a name="l00297"></a><span class="lineno">  297</span>&#160;    <span class="keyword">public</span>:</div>
<div class="line"><a name="l00298"></a><span class="lineno">  298</span>&#160;        <a class="code" href="classgraphchi_1_1barrier.html">barrier</a>(<span class="keywordtype">size_t</span> numthreads) { pthread_barrier_init(&amp;m_barrier, NULL, numthreads); }</div>
<div class="line"><a name="l00299"></a><span class="lineno">  299</span>&#160;        ~barrier() { pthread_barrier_destroy(&amp;m_barrier); }</div>
<div class="line"><a name="l00300"></a><span class="lineno">  300</span>&#160;        <span class="keyword">inline</span> <span class="keywordtype">void</span> wait()<span class="keyword"> const </span>{ pthread_barrier_wait(&amp;m_barrier); }</div>
<div class="line"><a name="l00301"></a><span class="lineno">  301</span>&#160;    };</div>
<div class="line"><a name="l00302"></a><span class="lineno">  302</span>&#160;    </div>
<div class="line"><a name="l00303"></a><span class="lineno">  303</span>&#160;<span class="preprocessor">#else</span></div>
<div class="line"><a name="l00304"></a><span class="lineno">  304</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00308"></a><span class="lineno"><a class="code" href="classgraphchi_1_1barrier.html">  308</a></span>&#160;    <span class="keyword">class </span><a class="code" href="classgraphchi_1_1barrier.html">barrier</a> {</div>
<div class="line"><a name="l00309"></a><span class="lineno">  309</span>&#160;    <span class="keyword">private</span>:</div>
<div class="line"><a name="l00310"></a><span class="lineno">  310</span>&#160;        <a class="code" href="classgraphchi_1_1mutex.html">mutex</a> m;</div>
<div class="line"><a name="l00311"></a><span class="lineno">  311</span>&#160;        <span class="keywordtype">int</span> needed;</div>
<div class="line"><a name="l00312"></a><span class="lineno">  312</span>&#160;        <span class="keywordtype">int</span> called;</div>
<div class="line"><a name="l00313"></a><span class="lineno">  313</span>&#160;        <a class="code" href="classgraphchi_1_1conditional.html">conditional</a> c;</div>
<div class="line"><a name="l00314"></a><span class="lineno">  314</span>&#160;        </div>
<div class="line"><a name="l00315"></a><span class="lineno">  315</span>&#160;        <span class="comment">// we need the following to protect against spurious wakeups</span></div>
<div class="line"><a name="l00316"></a><span class="lineno">  316</span>&#160;        std::vector&lt;unsigned char&gt; waiting;</div>
<div class="line"><a name="l00317"></a><span class="lineno">  317</span>&#160;    <span class="keyword">public</span>:</div>
<div class="line"><a name="l00318"></a><span class="lineno">  318</span>&#160;        </div>
<div class="line"><a name="l00319"></a><span class="lineno">  319</span>&#160;        <a class="code" href="classgraphchi_1_1barrier.html">barrier</a>(<span class="keywordtype">size_t</span> numthreads) {</div>
<div class="line"><a name="l00320"></a><span class="lineno">  320</span>&#160;            needed = (int)numthreads;</div>
<div class="line"><a name="l00321"></a><span class="lineno">  321</span>&#160;            called = 0;</div>
<div class="line"><a name="l00322"></a><span class="lineno">  322</span>&#160;            waiting.resize(numthreads);</div>
<div class="line"><a name="l00323"></a><span class="lineno">  323</span>&#160;            std::fill(waiting.begin(), waiting.end(), 0);</div>
<div class="line"><a name="l00324"></a><span class="lineno">  324</span>&#160;        }</div>
<div class="line"><a name="l00325"></a><span class="lineno">  325</span>&#160;        </div>
<div class="line"><a name="l00326"></a><span class="lineno">  326</span>&#160;        ~<a class="code" href="classgraphchi_1_1barrier.html">barrier</a>() {}</div>
<div class="line"><a name="l00327"></a><span class="lineno">  327</span>&#160;        </div>
<div class="line"><a name="l00328"></a><span class="lineno">  328</span>&#160;        </div>
<div class="line"><a name="l00329"></a><span class="lineno">  329</span>&#160;        <span class="keyword">inline</span> <span class="keywordtype">void</span> wait() {</div>
<div class="line"><a name="l00330"></a><span class="lineno">  330</span>&#160;            m.lock();</div>
<div class="line"><a name="l00331"></a><span class="lineno">  331</span>&#160;            <span class="comment">// set waiting;</span></div>
<div class="line"><a name="l00332"></a><span class="lineno">  332</span>&#160;            <span class="keywordtype">size_t</span> myid = called;</div>
<div class="line"><a name="l00333"></a><span class="lineno">  333</span>&#160;            waiting[myid] = 1;</div>
<div class="line"><a name="l00334"></a><span class="lineno">  334</span>&#160;            called++;</div>
<div class="line"><a name="l00335"></a><span class="lineno">  335</span>&#160;            </div>
<div class="line"><a name="l00336"></a><span class="lineno">  336</span>&#160;            <span class="keywordflow">if</span> (called == needed) {</div>
<div class="line"><a name="l00337"></a><span class="lineno">  337</span>&#160;                <span class="comment">// if I have reached the required limit, wait up. Set waiting</span></div>
<div class="line"><a name="l00338"></a><span class="lineno">  338</span>&#160;                <span class="comment">// to 0 to make sure everyone wakes up</span></div>
<div class="line"><a name="l00339"></a><span class="lineno">  339</span>&#160;                </div>
<div class="line"><a name="l00340"></a><span class="lineno">  340</span>&#160;                called = 0;</div>
<div class="line"><a name="l00341"></a><span class="lineno">  341</span>&#160;                <span class="comment">// clear all waiting</span></div>
<div class="line"><a name="l00342"></a><span class="lineno">  342</span>&#160;                std::fill(waiting.begin(), waiting.end(), 0);</div>
<div class="line"><a name="l00343"></a><span class="lineno">  343</span>&#160;                c.broadcast();</div>
<div class="line"><a name="l00344"></a><span class="lineno">  344</span>&#160;            }</div>
<div class="line"><a name="l00345"></a><span class="lineno">  345</span>&#160;            <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00346"></a><span class="lineno">  346</span>&#160;                <span class="comment">// while no one has broadcasted, sleep</span></div>
<div class="line"><a name="l00347"></a><span class="lineno">  347</span>&#160;                <span class="keywordflow">while</span>(waiting[myid]) c.wait(m);</div>
<div class="line"><a name="l00348"></a><span class="lineno">  348</span>&#160;            }</div>
<div class="line"><a name="l00349"></a><span class="lineno">  349</span>&#160;            m.unlock();</div>
<div class="line"><a name="l00350"></a><span class="lineno">  350</span>&#160;        }</div>
<div class="line"><a name="l00351"></a><span class="lineno">  351</span>&#160;    };</div>
<div class="line"><a name="l00352"></a><span class="lineno">  352</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00353"></a><span class="lineno">  353</span>&#160;<span class="preprocessor"></span>    </div>
<div class="line"><a name="l00354"></a><span class="lineno">  354</span>&#160;    </div>
<div class="line"><a name="l00355"></a><span class="lineno">  355</span>&#160;    </div>
<div class="line"><a name="l00356"></a><span class="lineno">  356</span>&#160;    <span class="keyword">inline</span> <span class="keywordtype">void</span> prefetch_range(<span class="keywordtype">void</span> *addr, <span class="keywordtype">size_t</span> len) {</div>
<div class="line"><a name="l00357"></a><span class="lineno">  357</span>&#160;        <span class="keywordtype">char</span> *cp;</div>
<div class="line"><a name="l00358"></a><span class="lineno">  358</span>&#160;        <span class="keywordtype">char</span> *end = (<span class="keywordtype">char</span>*)(addr) + len;</div>
<div class="line"><a name="l00359"></a><span class="lineno">  359</span>&#160;        </div>
<div class="line"><a name="l00360"></a><span class="lineno">  360</span>&#160;        <span class="keywordflow">for</span> (cp = (<span class="keywordtype">char</span>*)(addr); cp &lt; end; cp += 64) __builtin_prefetch(cp, 0); </div>
<div class="line"><a name="l00361"></a><span class="lineno">  361</span>&#160;    }</div>
<div class="line"><a name="l00362"></a><span class="lineno">  362</span>&#160;    <span class="keyword">inline</span> <span class="keywordtype">void</span> prefetch_range_write(<span class="keywordtype">void</span> *addr, <span class="keywordtype">size_t</span> len) {</div>
<div class="line"><a name="l00363"></a><span class="lineno">  363</span>&#160;        <span class="keywordtype">char</span> *cp;</div>
<div class="line"><a name="l00364"></a><span class="lineno">  364</span>&#160;        <span class="keywordtype">char</span> *end = (<span class="keywordtype">char</span>*)(addr) + len;</div>
<div class="line"><a name="l00365"></a><span class="lineno">  365</span>&#160;        </div>
<div class="line"><a name="l00366"></a><span class="lineno">  366</span>&#160;        <span class="keywordflow">for</span> (cp = (<span class="keywordtype">char</span>*)(addr); cp &lt; end; cp += 64) __builtin_prefetch(cp, 1);</div>
<div class="line"><a name="l00367"></a><span class="lineno">  367</span>&#160;    }</div>
<div class="line"><a name="l00368"></a><span class="lineno">  368</span>&#160;    </div>
<div class="line"><a name="l00369"></a><span class="lineno">  369</span>&#160;    </div>
<div class="line"><a name="l00370"></a><span class="lineno">  370</span>&#160;}; </div>
<div class="line"><a name="l00371"></a><span class="lineno">  371</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00372"></a><span class="lineno">  372</span>&#160;<span class="preprocessor"></span></div>
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